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2. Grading (earthworks) - Wikipedia

   en.wikipedia.org/wiki/Grading_(earthworks)

   Section through railway track and foundation showing the sub-grade. Grading in civil engineering and landscape architectural construction is the work of ensuring a level base, or one with a specified slope, [1] for a construction work such as a foundation, the base course for a road or a railway, or landscape and garden improvements, or surface drainage.

3. Fill dirt - Wikipedia

   en.wikipedia.org/wiki/Fill_dirt

   Fill dirt is taken from a location where soil is being removed as a part of leveling an area for construction; it may also contain sand, rocks, and stones, as well as earth. Fill dirt should be as free of organic matter as possible since organic matter will decompose creating pockets of empty space within the fill which could result in settling.

4. Earthworks (engineering) - Wikipedia

   en.wikipedia.org/wiki/Earthworks_(engineering)

   Keyline design – Landscaping to optimize water usage; Land restoration – Process of restoring land to a different state; Grading (earthworks) – In civil engineering, creating a profile; Spoil tip – Pile built of accumulated spoil; Subgrade – Material underneath a road or track; Terrace (earthworks) – Terrain formed by tiered platforms

5. Retaining wall - Wikipedia

   en.wikipedia.org/wiki/Retaining_wall

   A retaining wall is designed to hold in place a mass of earth or the like, such as the edge of a terrace or excavation. The structure is constructed to resist the lateral pressure of soil when there is a desired change in ground elevation that exceeds the angle of repose of the soil.

6. Soil conservation - Wikipedia

   en.wikipedia.org/wiki/Soil_conservation

   Terracing is the practice of creating nearly level areas in a hillside area. The terraces form a series of steps each at a higher level than the previous. Terraces are protected from erosion by other soil barriers. Terraced farming is more common on small farms. This involves creating a series of flat terraced levels on a sloping field.

7. Soil survey - Wikipedia

   en.wikipedia.org/wiki/Soil_survey

   A homeowner may even use the information for maintaining or constructing their garden, yard, or home. Soil survey information can be used to predict or estimate the potentials and limitations of soils for many specific uses. A soil survey includes an important part of the information that is used to make workable plans for land management.